make_ext4fs: command not find

在新机器上生成镜像的时候，出现了这个错误。
经查阅，应该安装android-tools-fsutils
应该运行下面的命令

sudo apt-get update
sudo apt-get install android-tools-fsutils

然后使用make_ext4fs制作镜像的时候出现了一个空间不足的错误，

root@mavel-Infernity:~/compilePlace/creater5.7# make_ext4fs -s -l 200M -a root -L linux system.img root
Creating filesystem with parameters:
    Size: 314572800
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 6400
    Inode size: 256
    Journal blocks: 1200
    Label: linux
    Blocks: 76800
    Block groups: 3
    Reserved block group size: 23
error: ext4_allocate_best_fit_partial: failed to allocate 2029 blocks, out of space?

经实验， 原来是因为root文件夹本身就占用了320MB的空间， 但是指定system.img的大小只有200MB，所以重新制定空间为330MB，成功解决了问题。

root@mavel-Infernity:~/compilePlace/creater5.7# make_ext4fs -s -l 330M -a root -L linux system.img root
Creating filesystem with parameters:
    Size: 346030080
    Block size: 4096
    Blocks per group: 32768
    Inodes per group: 7040
    Inode size: 256
    Journal blocks: 1320
    Label: linux
    Blocks: 84480
    Block groups: 3
    Reserved block group size: 23
Created filesystem with 13478/21120 inodes and 83940/84480 blocks